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https://issues.apache.org/jira/browse/IGNITE-20047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Steshin closed IGNITE-20047.
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IGNITE-19904
> NPE in evicted pages counter of the checkpoint progress.
> --------------------------------------------------------
>
> Key: IGNITE-20047
> URL: https://issues.apache.org/jira/browse/IGNITE-20047
> Project: Ignite
> Issue Type: Bug
> Reporter: Vladimir Steshin
> Priority: Major
> Attachments: failureNPE.log, npe_failure2.log, npe_pu_counter_2.15.log
>
>
> NPE can occur in
> {code:java}
> /** {@inheritDoc} */
> @Override public void updateEvictedPages(int delta) {
> A.ensure(delta > 0, "param must be positive");
> if (evictedPagesCounter() != null)
> evictedPagesCounter().addAndGet(delta);
> }
> {code}
> because evictedPagesCounter is already null below 'if'. `clearCounters()` is
> invoked in _markCheckpointEnd()_. But it is possible that the counter is
> being concurrently updated.
> Looks able to corrupt PDS if the process failed when checkpoint end marker is
> saved but the page is not yet.
> Probably, happens with the _DelayedDirtyPageStoreWrite_ /
> _DelayedDirtyPageStoreWrite_. Found in the defragmentation process. But it
> seems to be a common problem. Logs attached.
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